BUF22821

現行

具整合式 2 組記憶體的 22 通道 Gamma 電壓產生器和 Vcom 校準器

產品詳細資料

Display type LCD unipolar IC integration Gamma buffer, VCOM Vin (min) (V) 9 Vin (max) (V) 20 Applications 13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches Source driver voltage (min) (V) 9 Source driver voltage (max) (V) 20 Level shifter/scan driver (Ch) 0 Features Gamma buffer, I2C interface, VCOM or op amp Rating Catalog Operating temperature range (°C) -40 to 95
Display type LCD unipolar IC integration Gamma buffer, VCOM Vin (min) (V) 9 Vin (max) (V) 20 Applications 13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches Source driver voltage (min) (V) 9 Source driver voltage (max) (V) 20 Level shifter/scan driver (Ch) 0 Features Gamma buffer, I2C interface, VCOM or op amp Rating Catalog Operating temperature range (°C) -40 to 95
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4
  • 24-CHANNEL GAMMA
    • 22-CHANNEL PROGRAMMABLE
    • 2-CHANNEL STATIC GAMMA
  • 2-CHANNEL PROGRAMMABLE VCOM
  • 10-BIT RESOLUTION
  • 16x REWRITABLE NONVOLATILE MEMORY
  • TWO INDEPENDENT MEMORY BANKS
  • RAIL-TO-RAIL OUTPUT
  • LOW SUPPLY CURRENT: 0.5mA/channel
  • SUPPLY VOLTAGE: 9V to 20V
  • DIGITAL SUPPLY: 2V to 5.5V
  • I2C™ INTERFACE
  • APPLICATIONS
    • TFT-LCD REFERENCE DRIVERS

PowerPAD is a trademark of Texas Instruments.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.

  • 24-CHANNEL GAMMA
    • 22-CHANNEL PROGRAMMABLE
    • 2-CHANNEL STATIC GAMMA
  • 2-CHANNEL PROGRAMMABLE VCOM
  • 10-BIT RESOLUTION
  • 16x REWRITABLE NONVOLATILE MEMORY
  • TWO INDEPENDENT MEMORY BANKS
  • RAIL-TO-RAIL OUTPUT
  • LOW SUPPLY CURRENT: 0.5mA/channel
  • SUPPLY VOLTAGE: 9V to 20V
  • DIGITAL SUPPLY: 2V to 5.5V
  • I2C™ INTERFACE
  • APPLICATIONS
    • TFT-LCD REFERENCE DRIVERS

PowerPAD is a trademark of Texas Instruments.
I2C is a trademark of NXP Semiconductors.
All other trademarks are the property of their respective owners.

The BUF22821 offers 22 programmable gamma channels, two programmable VCOM channels, and two static gamma channels. It is ideal for the new 10-bit source drivers that require 22 gamma channels.

The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF22821 supports up to 16 write operations to the on-chip memory. The BUF22821 has two separate banks of memory, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves.

All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 100mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.

The BUF22821 is manufactured using Texas Instruments' proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and high supply voltage operation of up to 20V. The BUF22821 is offered in a HTSSOP-38 PowerPAD™ package. It is specified from -40°C to +85°C.

The BUF22821 offers 22 programmable gamma channels, two programmable VCOM channels, and two static gamma channels. It is ideal for the new 10-bit source drivers that require 22 gamma channels.

The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF22821 supports up to 16 write operations to the on-chip memory. The BUF22821 has two separate banks of memory, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves.

All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 100mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.

The BUF22821 is manufactured using Texas Instruments' proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and high supply voltage operation of up to 20V. The BUF22821 is offered in a HTSSOP-38 PowerPAD™ package. It is specified from -40°C to +85°C.

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技術文件

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類型 標題 日期
* Data sheet Programmable Gamma-Voltage Generator and Vcom Calibrator with Two-Bank Memory datasheet (Rev. D) 2011年 7月 12日
EVM User's guide BUF22821EVM-USB Users Guide (Rev. A) 2016年 5月 31日
Application note Driving Capacitive Loads with Gamma Buffers 2012年 11月 20日
More literature BUF22821EVM Thank You Letter 2007年 12月 21日
EVM User's guide BUF22821EVM Evaluation Board User's Guide / Software Tutorial 2007年 9月 11日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

BUF22821EVM-USB — BUF22821 評估板

The BUF22821EVM-USB is a platform for evaluating the performance of the BUF22821 gamma-voltage generator under various signal, reference and supply conditions.

This device offers 22 programmable gamma channels, each with 10 bit resolution.

使用指南: PDF
TI.com 無法提供
支援軟體

SBOC245 BUF22821EVM Software

支援產品和硬體

支援產品和硬體

產品
LCD 及 OLED 顯示器電源和驅動器
BUF22821 具整合式 2 組記憶體的 22 通道 Gamma 電壓產生器和 Vcom 校準器
支援軟體

SBOC417 BUF22821EVM-USB User Software

支援產品和硬體

支援產品和硬體

產品
LCD 及 OLED 顯示器電源和驅動器
BUF22821 具整合式 2 組記憶體的 22 通道 Gamma 電壓產生器和 Vcom 校準器
硬體開發
開發板
BUF22821EVM-USB BUF22821 評估板
支援軟體

SBOC418 BUF22821EVM-USB Source Code

支援產品和硬體

支援產品和硬體

產品
LCD 及 OLED 顯示器電源和驅動器
BUF22821 具整合式 2 組記憶體的 22 通道 Gamma 電壓產生器和 Vcom 校準器
硬體開發
開發板
BUF22821EVM-USB BUF22821 評估板
模擬型號

Gamma Buffer I2C IBIS Model

SBOM409.ZIP (39 KB) - IBIS Model
模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (DCP) 38 Ultra Librarian

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  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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